Concentrating-table.



W. L. MUBNDER.

GONOENTRATING TABLE.

APPLIOATIOH FILED JAN. 7, 1911.

1,015,823. Patented Jan. 30, 1912.

2 SHEETS-SHEET 1.

Attorneys W. L. MUENDBR.

GDNGENTBA'I'ING TABLE.

APPLICATION FILED JAN.7, 1911.

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[I Inventor" s V. e n r O t t A UNITED STATES PATENT OFFICE.

WILLIAM L. MUENDER, OF MONTFORD, WISCONSIN.

CONCENTRATING-TABLE.

To all whom it may concern:

Be it known that I, \ViLmAM L. MUEN- mm, a citizen of the United States,residing at Montford, in the county of Grant and State of \Visconsin,have invented a new and useful Concentrating-Table, of which thefollowing is a specification.

It is the object of this invention to provide a dry concentratingmechanism, whereby the ore will be separated into different masses ofdifferent specific gravities, at successive steps in the operation, thegangue being maintained apart from the ore, by an air blast, until theore has been completely separated, into masses of different specificgravities.

Another object of the invention is to provide a novel form of riddle, soconstructed that, when the same is operated in conjunction with an airblast, and a reciprocating casing, the gangue and the ore will bemaintained separate and apart, to be deposited individually in differentlocalities.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed without departing from the spirit of theinvention.

In the accompanying drawings-Figure 1 is a view of the invention in sideelevation; Fig. 2 is a vertical longitudinal section; Fig. 3 is a topplan; Fig. 4 is a transverse section on the line A-B-of Fig. 3; Fig. 5is a perspective, showing a portion of the lower face of one of theriddles; Fig. 6 is a fragmental top plan of the easing; and Fig. is afragmental transverse section, the view showing the manner in which thegate cooperates with other portions of the structure.

Referring particularly to the drawings, and noting Fig. 1, that end ofthe device to which the numeral A is applied, will be considered as theforward end of the machine, that portion of the structure to which theletter B is applied, being considered as the rear end of the machine.

Specification of Letters Patent.

Application filed January 7, 1911.

Patented Jan. 30,1912.

Serial No. 601,418.

In carrying out the invention, there is provided as a primary andfundamental element, a box-like casing 1, closed at the bottom, andequipped with suitable bearings 2, to which the upper extremities ofrock arms 3 are pivoted, the rock arms be ing pivotally mounted at theirlower ends in pillow blocks 4, resting upon a suitable support 5.

To the forward end of the casing 1, a pitman 6 is operatively connected,the pit man carrying at its forward end, a strap 7, embracing aneccentric 8, adjustably held upon a shaft 9, mounted for rotation inbearings 10, supported by a suitable foundation 11, the shaft- 9 beingequipped with a pulley 12, which may be taken as typical of any suitablemeans whereby rotation may be imparted to the shaft 9.

Through the bottom 14 of the casing 1, an air blast pipe 15 extends, adeflector 16 being positioned above the discharge end of the pipe 15,within the casing 1.

As denoted by the numeral 17, and as seen most clearly in Fig. l, theupper edge of the casing 1 slants downwardly from the forward end of thecasing toward the rear end of the casing, so that when the ore isdeposited upon riddles, supported upon the upper edge of the casing .lthe ore will move gravitationally from the forward end of the casingtoward the rear end thereof when a reciprocating motion is imparted tothe casing 1, through the rotation of the shaft 9, the eccentric 8 andthe pitman G obviously imparting a reciprocation to the casing, when theshaft 9 is rotated, as will be clearly understood, the casing 1, ofcourse, tilting upon the rock arms 3.

At spaced points, the side walls of the casing are united by cross bars18, longitudinal bars 19, disposed midway between the'side walls of thecasing, serving to unite one cross bar 18 with the next cross bar, thelongitudinal bars 19 uniting the terminal cross bars 18 with the endwalls of the casing 1. Located between the longitudinal bars 19 and theside walls of the casing 1, are gratings-20 the lon itudinal bars 19being depressed below t e upper edges of the side walls of the casing 1,and the gratings 2O sloping downwardly toward the longitudh nal centerof the casing, as an examination of Fig. 4 will render clear.

A mesh work fabric 21 is extended over the top of the casing 1, thefabric covering 21 being depressed along the longitudinal center of thecasing I, by means of securing strips 22, superposed upon the covering,and united with the longitudinal bars 19.

The invention further includes a plurality of riddles, disposedlongitudinally of the casing 1, in downwardly inclined relation, eachriddle discharging into the next adjoining one, from the forward end ofthe. casing toward the rear end thereof. Each riddle comprises a headboard 23, a tail board 24, and side walls 25, the tail board 24' of oneriddle being disposed in close proximity to the head board 23 of thenext adjoining riddle. In the intermediate portion of each tail board 24there is, as Fig. 5 will render evidence, a depending lug 26, adapted toregister in, but not to close entirely, an openin 27 (see Fig. 6) in thefabric covering 21, he opening 27 being located adjacent thelongitudinal center of the casing 1 and in the line of greatestdepression of the covering 21. The several riddles are held upon thecasing 1 by means of bolts 29, or other securing elements, extendingthrough mating ears 28 upon the side walls 25 of the riddles, and uponthe side walls of the easing 1. The riddles are equipped with divisionplates 30, adapted to rest upon the securing strips 22, t e divisionplates 30, in their lower edges, being depressed below the lower edgesof the side walls 25 of'the riddles. From the division plates 30, oreritfles 31 extend laterally towardthe side walls 25 of the riddles, andupon the ore riflles 31,

angue skimmers 32 are superposed, the grhnmers' 32 crossing the riflies31. The riflies 31 and the Skimmers 32 both slant downwardly from theside walls 25 of the riddles, toward the division plates 30, and in thelower edges of the riflies 31, adjacent the division lattes 30, thereare notches 33, having funo ions which will be described hereinafter.The gangue'slr'iminers 32 discharge over the tail cards 24 of theriddles, the riflles 31 discharging against the side tacos of the tailboards, as an examination of Fig. 3 virill render evident, theskiihrners 32 converging toward thefforward end of the cas ing 1, whilethe fifties 31 converge toward the rear end or the casing.

Supported upon each tail board 2;, is a bracket 34, in which is'inounteda vertically moving gate 35, ada ted to effect a closure of the opening27, t ese openings 27 communicating with laterally extended chutes 36,'rolonged, as seen in Fig. 1, through one of t e side walls of the casing1.

At the forward end of the casing 1 any suitable delivery mechanism,indicated conventionally at 37, may be positioned, while to the rear endof the casing 1, the gangue spout 38 is secured.

The operation of the device is as follows: The ore is delivered into theforward end of the structure. through the ((JIIYOHllOIlttllY shownmechanism 37. the ore being deposited upon the uppermost riddle.lteciproeation being imparted to the casing 1, through theinstrumentality of the pitman (j, in the manner hereinbefore described,the heavier material will work downwardly between tbc rillles 31 and theshimmers 30, to rest upon the fabric covering 21. By rcason of the fact.that the riddles slope down wardly toward the longitudinal center of themachine, the heavier material following the. rillles 31. will movetoward the division plates 30, the notches 33 in the lower edges of therilllcs, permitting the heavier material to move longitudinally of thecasing 1, and to come into abutment, ultimately, with the tail board 24of the uppermost riddle. By opening the gate 35, in the uppermostriddle, the heavier material may be permitted to flow away through thefirst discharge tube 36. During the foregoing operation, a blast of airwill have been supplied to the interior of the casing 1, below thecovering 21, through the instrumentality of the air blast pipe 15. Thisair blast, delivered be neath the covering 21, will serve to elevate thegangue above the heavier ore, the gangue following the shimmers 32, tobe dischar ed, along with the lighter ore, over the tail lioard 24 ofthe first riddle, and over the head board 23 of the next riddle, intothe last named riddle.

The operation above described in connection with the first, uppermostriddle, will take place upon the intermediate riddle, and upon the lastriddle, successive masses of ore being drawn away through the dischargespouts 38, the gangue, at last, passing over'thc tail board 24 of thelast, lowermost riddle, and entering the gangue spout 38.

From the foregoing it will be seen that the heaviest material will besegregated by the first discharge chute 36, a mass of material of slihtly less specific gravity being delivered y the next chute 3G, a thirdniass of material of still less specific gravity being delivered by thelast chute 36, the gangile ulti'ma'tely passing out'of the rear endoi'the easing, into the spout 38. The reciprocation of the casing 1 willserve to separate the ore, according to its speci c gravity, the airblast, delivered through t e ip'e 15, serving to carry the g'angue upwarly, so that the shimmers 32 may pass the gangue from one riddle toanother, and finally deposit the aiigue in the gala u'e spout 38, thegangue being held apart rom the ore, durin the time that the ore isbeing segre ate and withdrawn through the chutes 38, y the reciprocationof the casing 1.

It will of course be understood, without specific delineation, that thecasing 1 may be of any length, and that any number of riddles may beemployed thereon.

Having thus described the invention, what is claimed is:

1. In a device of the class described, a casing; a mesh work coveringthereon; a riddle upon the casing above the covering, the riddlecomprising intersecting ore riflies and gangue skimmers, the skimmer-sbeing superposed upon the rifiles, the riflles and the skimmers slantingdownwardly toward the longitudinal center of the casing, there beingopenings in the lower edges of the riiiles, adjacent the longitudinalcenter of the casing, to permit the ore to move longitudinally of thecasing; means for imparting a longitudinal reciprocation to the easing;and means for supplying fluid under pressure beneath the mesh workcovering.

2. In a device of the class described, a casing; a mesh-work coveringthereon; a riddle carried by the casing, above the covering, the riddlecomprising a tail-board and intersectin ore riflles and gangue skimmers,the riflles discharging against the tailboard, and the skimmers beingextended across the tail-board, the rifiles and the shimmers slantingdownwardly toward the longitudinal center of the table; there beingopenings in the lower edges of the riflies, adjacent the longitudinalcenter only of the casing; a movable gate carried by the easing adjacentthe discharge end 0 the tailboard and adapted to receive the materialfrom the riflies, the gate being extended but part way across thecasing, and being located adjacent the longitudinal center of thecasing; the covering being provided with an opening for which the gateconstitutes a closure; means for imparting a longitudinal reciprocationto the casing; and means for supplying an air blast beneath thecovering.

In testimony that I claim the foregoing as my own, I have hereto afiixedmy signature in the presence of two Witnesses.

WILLIAM L. MUENDER.

J. C. MASON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

